Sawmill-carriage.



PATENTED JAN. 10, 1905. J. O. WILLIAR.

SAWMILL CARRIAGE.

APPLICATION FILED AUG. 13, 1904.

2 SHEETSSIHEET 1.

NUQW Invenfor No. 779,454. PATENTED JAN. 10, 1905. J. O. WILLIAR.

SAWMILL CARRIAGE.

APPLICATION FILED AUG.18, 1904.

2 SHEETS-SHEET 2.

man zz nmm W Attornegs Witnesses Patented January 10, 1905.

PATENT OFFICE.

JACOB O. WVILLIAR, OF MOUNT AIRY, MARYLAND.

SAWMILL-CARRIAGE.

SPECIFICATION forming part of Letters Patent No. 779,454, dated January 10, 1905. Application filed August 18, 1904:- Serial No. 221,250.

To all who/72, it may concern:

Be it known that I, JAooB O. W ILLIAR, a citizen of the United States, residing at Mount Airy, in the county of Carroll and State of Maryland, have invented a new and useful Sawmill-Carriage, of which the following is a specification.

This invention relates to sawmill-carriages,

and has for its object to provide an improved arrangement of head blocks wherein each head-block is adjustable upon the carriage independently of the other in order that said head-blocks may be placed in the most advantageous position for supporting the work, particularly irregular or crooked logs. i Another object of the invention is to equip each head-block with a vertically-adjustable log-supporting member to further accommodate the head-block to irregularities in timher and to facilitate the adjustment'of said member.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportions, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a plan View of a sawmill-carriage embodying the features of the present invention. Fig. 2 is a side elevation thereof with one of the head-blocks in section. Fig. 3 is a cross-sectional view of the carriage, taken at one side of one of the headblocks. Fig. 4 is a similar View taken through one of the head-blocks.

Like characters of reference designate corresponding parts in each and every figure of the drawings.

In illustrating the application and operation of the present invention there has been shown in the accompanying drawings a conventional or approved form of sawmill-carriage made up of longitudinal sills or side bars 1 and 2, connected by cross-bars 3, so as to form a rectangular frame,whicl1 is mounted to slide upon a guideway 4: toward and away from the circular saw 5. Upon the top of each of the side bars or sills of the carriage is a flat metallic strip orrail 6, forming asmooth slide or guideway for each of the head-blocks 7, which extend transversely across the top of the carriage and is mounted to slide longitudinally thereon, each end of each rail or track 6 being turned up, as at 8, to form a stop to prevent displacement of the adjacent headblock.

The head-blocks being duplicates in construction, a description of one of the blocks is deemed sufficient.

As best shown in Fig. 4 of the drawings,

each head-block is hollow and contains a shaft 9, having its ends journaled in opposite ends of the head-block, with its forward end projected externally of the block and made noncircular, as at 10, for the reception of a detachable crank-handle. (Illustrated in dotted lines in Fig. 4:.) Upon thisshaft and rotatable therewith are pinions 11 and 12, located adjacent the respective ends of the headblock and meshing with racks 13 and 14, carried by the carriage, the rack 13 being at the inner side of the frame bar or rail 1 and the rack 14 at the outer side of the other rail, 2. From an examination of Fig. l of the drawings it will be noted that there is an opening between each pair of teeth, so as to permit sawdust and the like dropping down through the rack without choking the latter. A guide projection 15 depends from one end portion of the head-block and works at the inner side of the rail 2, and a substantially L-shaped guide projection 16 also depends from .the head-block and underlaps the adjacent rack 13 to prevent upward displacement of the head-block. By rotating the shaft 9'the pinions may be caused to travel upon the racks 13 and 14:, thereby shifting the head-block longitudinally of the carriage to any desired position. The advantage of this adjustment of the head-block longitudinally of the carriage will be apparent by an examination of Fig. 2 of the drawings, wherein three head-blocks have been shown, with a stick of timber, (illustrated in dotted lines) su pported upon the head-blocks, with the-latter set at suitable points for the most advantageous support of said stick of timber.

Where irregularities occur in a stick of timber, the latter does not always rest evenly upon all of the head-blocks, and therefore I propose to equip each head-block with a vertically-adjustable logsupporting member. In carrying out this feature of the invention a knee 17 is mounted to slide from end to end upon the top of each head-block and is provided upon its under side with a dovetailed rib l8, slidably engaging a dovetailed groove or guideway in the top of the head-block. At that end of the knee which is adjacent the saw there is an upstanding standard member 20, which is designed to bear against one side of the stick of timber and hold the same against thesaw. This standard is provided with a vertical slot or bifurcation 21, with the walls of the slot provided with corresponding upright grooves 22, which intersect the top of the standard, and both the slots and the grooves are closed at their upper ends by a plate 23. An angular bracket 24 has one arm 25 slidably mounted in the slotted portion of the standard and provided with lateral tongues or projections 26, working in the grooves 22 as guides to prevent lateral displacement of the bracket. The other arm, 27, of the bracket depends at the rear of the headblock and is provided with an opening 28, in which is supported an endwise-adjustable logsupporting arm 29, provided at its rear face with a longitudinal series of sockets 30. A spring-actuated pin 31 is mounted upon and pierces the pendent arm 27 of the bracket 24:, so as to engage any of the sockets 30 in the member 29 to hold the latter in any adjusted position, there being a suitable head or fingerpiece 32 upon the outer end of the pin convenience in actuating the latter. The horizontal arm 25 of the bracket 24: is pierced by an upright adjusting-screw 33, having its lower end journaled in the knee 17, as indicated at 34: while its upper end is journaled in the plate 23 and is provided with a handwheel 35 above said plate for convenience in rotating the screw, so as to adjustably elevate the bracket 24:, and thereby raise the member 29 above the top face of the knee, so as to engage that portion of the log which would otherwise lie above and out of contact with the head-block.

From the foregoing description it will be understood that each head-block may be shifted in the longitudinal direction of the carriage independently of any of the other head-blocks by manipulation of its shaft 9, so as to locate the head-block for the most effective support of the piece of timber, and the knee can of course be shifted longitudinally of the headblock, according to the thickness of the piece for of timber being cut. Moreover, should the piece of timber be crooked and not engage the head-block when the latter is adjusted to a desired position the log-supporting member 29 may be elevated by manipulation of the hand-wheel 35 into contact with the under side of the log, so as to efiectually support the latter at the desired point. When the knee is shifted rearwardly upon the head-block or away from the saw, the member 29 can of course be shifted forwardly, so as to properly underlie the log.

While the drawings do not disclose dogs for holding the timber when being cut, it will of course be understood that in actual use dogs will be employed, and as the formof dogs is immaterial to the present invention it has not been deemed necessary to illustrate the same.

Having fully described the invention, what is claimed is 1. A head-block for sawmill-carriages having a work-support adjustable horizontally for projection in front of the head-block and also capable of adjustment to positions above and below the upper face of the block.

2. A head-block having a vertically-adjustable bracket, a work-support carried by the bracket and shiftable endwise thereon, and means carried by the bracket to engage the work-support and hold the same against endwise movement.

3. A head-block for sawmill-carriages having a knee provided with an upright slot, an angle-bracket having one arm slidable in the slot with its other arm lying at one side of the block and provided with an opening substantially parallel with the block, a work-supporting arm adjustable endwise in the open ing of the bracket, a spring-pressed locking device carried by the bracket for engagement with the work-supporting arm, and an ad justing-screw piercing the bracket and journaled in the knee and provided at its upper end with a hand-wheel.

4. A. head-block for sawmill-carriages having a knee provided with an upright guideway, a bracket working in the guideway, an adjusting-screw piercing the bracket and journaled in the knee and provided at its upper end with a hand-wheel, a work-support carried by the bracket and adjustable longitudinally of the head-block, and means carried by the bracket and engaging the work-support to adjustably clamp the latter upon the bracket.-

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JACOB O. WVILLIAR.

Witnesses:

THos. (J. PEARRE, J AMES L. BOSTAIN.

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